| 一类具正负系数中立型方程的正解 |
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| 引用本文： | 唐先华 庚建设. 一类具正负系数中立型方程的正解[J]. 应用数学, 1999, 12(2): 97-102 |
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| 作者姓名： | 唐先华 庚建设 |
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| 作者单位： | [1]中南工业大学应用数学与应用软件系 [2]湖南大学应用数学系 |
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| 摘 要： | 研究一类具有正负系数的中立型微分方程，得到了这类方程存在正解的充分条件和存在有界正解的充要条件，并据此给出了其存在无界正解的充分条件。
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| 关 键 词： | 正解 振动性 中立型方程 正系数 负系数 |
On the Positive Solutions of a Kind of Neutral Equations with Positive and Negative Coefficients |
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| Tang Xianhua. On the Positive Solutions of a Kind of Neutral Equations with Positive and Negative Coefficients[J]. Mathematica Applicata, 1999, 12(2): 97-102 |
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| Authors: | Tang Xianhua |
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| Abstract: | In this paper we consider the neutral differential equations with positive and negative co-efficients. Sufficient conditions for the existence of positive solutions and a sufficient and nec-essary condition for the existence of bounded positive solutions are obtained. A sufficient con-dition for the existence of unbounded positive solutions also has been established. |
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| Keywords: | Positive solution Oscillation Neutral |
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